From a compose window go to Options Delivery Status Notification to add a DSN request to the outgoing message.

What are you going to do about it The receipt proves nothing, because it has no way of telling who read the message.

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Is there a way to enable it through terminal or by 3-rd party add-on If theres no way, Im going to have to switch back to MS Outlook.

Quit Mail Open Terminal (ApplicationsUtilities) Enter the following text (make sure to keep all quotes exactly as is) defaults write com.apple.mail UserHeaders Disposition-Notification-Toyouraddress; (of course, using your correct email address instead of youraddress) All future messages sent with Mail will now include the Disposition-Notification-To header which is the one asking for a return receipt.

If you wish to turn off this feature in the future, type the following in the Terminal: defaults delete com.apple.mail UserHeaders.

Read-receipts are basically just a courtesy e-mail sent by a client in response to a specific header being set.

You really shouldnt use them because they tell you nothing anyway.

Second, who says most clients dont support them You Well you sure dont know what you are talking about.

To the extent that they do anything at all, they are most effective within a single domain.

By this, I mean those cases where the sender and recipient are on a single domain.

Receipts do not tell you that your recipient read your email.

From the perspective of a recipient, receipts are annoying and are a clear indication that the sender does not trust you.

You get a receipt.

The recipient denies ever receiving the message.

What are you going to do about it Pout Seethe in anger You have not solved your problem, but you are angry at your recipient and you are angry at yourself.

It proves the message was opened, but not necessarily that it was read.

Your students cant deny receiving it though, but they can deny it if they opt not to send the receipt.

All a read receipt says, if its even generated, and assuming it was generated by an e-mail client and not something else, is that an e-mail was opened.

Not that it was read, not that it was opened by the person you sent it to.

You send someone such a message and their client has stupidly decided to send the requested receipt, but the receipient denies ever reading the message.

Return Receipts In Outlook For Mac